This image is released under a CC BY-NC-SA 4.0 Licence
Science Museum Group © The Board of Trustees of the Science Musuem
Model (scale 1:8) of Perret's furnace utilizing refuse fuel, applied to Cornish boiler, on stand
This shows a boiler furnace for utilising dust or refuse fuel by the assistance of forced draught. It was patented by M. Perret in 1881.